trace-cmd split: Handle splitting files with multiple instances
trace-cmd can record events in multiple instances:
$ trace-cmd record -e sched_wakeup -B test_instance -e sched_switch
When trying to split a trace.dat file recorded with the above command,
only the events located in the main buffer seems to be split. The
events recorded in the test_instance buffer seem to be discarded:
$ trace-cmd split -i trace.dat -o trace_2.dat 284443 284444
$ trace-cmd report trace_2.dat
cpus=8
<...>-525991 [004] 284443.173879: sched_wakeup: [...]
<...>-525991 [004] 284443.173879: sched_wakeup: [...]
<...>-525990 [007] 284443.173885: sched_wakeup: [...]
<...>-525990 [007] 284443.173885: sched_wakeup: [...]
(no sign of sched_switch events)
Keep all instances/buffers of a trace when it is split.
Also add a 'get_handle()' function.
Link: https://lore.kernel.org/linux-trace-devel/20240123134215.385415-4-pierre.gondois@arm.com
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=218357
Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
1 file changed